Transformer



Dec. 18, 1928.

W. J. FINNEN TRANSFORMER Filed March 31,1926 2 Sheets-Sheet 1 WITNESSES: /M

INVENTOR l \/////0/77 Jfi/mem ATTORNEY Patented Dec. 18, 1928.

UNITED STATES PATENT OFFICE.

J. FI H NENyOI. SHARON, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE & KANUI'LOTUBING COMPANY, A CORPORATION OF PENNSYLVANIA,

'rnansromn.

' Application salami. 31, 1926. Serial no. 98,669.

.My invention "relates to electricaltranslatingdevices and particularly to bracing devices for electrical transformers.

One object of invention is to provzde an electrical trans prmer, the tank walls of whichshall" not befrequired to brace the coils'and core members of the transformers. Another object of invention. is to provide an electrical transformer in which an auxili bracing structure prevents the coils an core members from coming in contact with the transformer wall during move ment or shipment of the transformer.

A further object of my inventionis to provide an electrical transformer, the walls of which may be of relatively light material by reason of the fact that they are relieved from all shocks and stresses that may arise from movement of the coil and core members of the transformer. With the steady increase in the size of electrical transformersg theproblem or dissipating the heat'generaited therein has been a serious problem with eleotrical; engineers. Since the rate of heat'dlssipation is inversely pro brtional to the thickness oft-he tank 'wal ithas become more im ortant that the walls of such transformers e made as thin as possible. Where the wall the transformer is only required to support ,the weight of the insulat-ing oil, it .islpossible to utilize sheet metal of .078 inches gauge. With such thin tank walls, however, itis necessary that the heavy mass of material constitutin the coils and core members shall be secure in place by means other than the transformer walls.

During shipment, it frequently happens that the cars on which the transformers are being shipped are subjected to sufficiently severe jolts to cause the core and coil members to strike the tank wallsl 'with such force that leaks result. culties by constructing a bracing frame with in the transformer tank that firmly lines the core and coil members inplace and is not attached to the tank walls,

In the accom an 'ng drawings. I

Figure l is a. to en view, partially in olevation and artially in section, of an electrical transfiirmer embodying my invention.

Fig. 2 is a plan View of the transformer shown in Fig. 1 and;

Fig. 3 is a plan view of a modified form of my invention.

ing to a base frame, 3, a header member 4 that is welded to the upper edges of the side walls 2 thereby forming a liquid tight hous- 111g for the transformer core and windings 5 together'with a bracing frame 6 that extends between 'the base 3 and the header member 4. K

The base frame 3 and'the header member 4 may be of any desired construction. The

bracing frame (5 is in the form of a steel frame-work. Within the tank walls 2 and independent therefrom, at each corner of the I rectangle there 1s mounted an angle i on 7 in vertical position.

The lower ends of the angle irons? are firmly welded 0r riveted to the base frame 3 and extend upwardly and engage the-header member 4 to which they are also welded or riveted, Wherebythey constitute the corners of a frame for transmitting, supporting and lifting strains between the header member 4 and the base frame 3.

The tank wa1ls2 are only called. upon to sup- .port and confine the insulating oil surrounding the transformer coils and core members 5'. 7 7

Cross braces 8 angle irons 7 at their lower ends and at points sufliciently high to ive rigidity to the several angle irons 7 there y constituting the bracing frame It is to be understood that the cross braces 8 shown in '1 are.

duplicated around the four sides of the transformer. The frame 6 thus constituted is at all points free from physical engagement with the tank walls'2; I

The verticalv elevation of the cross braces 8. may be the same for a number of sizes of the transformer coreand winding menibcrs thereby resulting in a material savingin the cost ofmanufacturing several number of styles and sizes of transformers.

Referring particularly to Fig. 2, the coil and core members 5 may be bodily lowered into the transformer casing between the several angle irons 7 whereby the angle irons 'act as guides for the core member and prevent it from damaging the walls 2. In order I to procure a. snug engagement between the angle irons 7 and the core and coil members 5, sections of angle irons 9 are secured to the are secured bctw'er-n the no i uplcr edgree of the transformer coils and core member 53 that engage, and fit into the angles of, the angle irons 7.

If, during shipment, the transformer 1 subjected to a jar so severe as to cause the coils and core member." 5 to move laterally in the tank a suilicient amount to tend to endanger the transformer walls 2, the angle irons 9 engage the vertical angle irons T. The strain thus transmitted to any angle iron T is transmitted by the attached cross braces 8 to the base member 3 attho adjacent corners of the transformer and, accordingly. the coil and core members 5 are brought to rest by the bracing action of one or more of the angle irons 7 without any blow being delivered to the tank walls 2.

Referring particularly to Fig. 3, I have shown wedge members 10 that may be inserted between the coil and core members 11 and the angle irons T where the former are of smaller dimensions than those of the form of my im'ention shown in Fig. 2. The function of the \vz-al cs it) is similar to that of the angle irons 9 in the other form of my invent ion.

It ill thus be seen that I have devised a bracing structure for transformers in which the shocks that may be produced by movements of the coil and core mcmb a are transmitted to a bracing structure that is entirely independent of the transformer tank walls. The transformer walls being thus; relieved from the necessity of withstanding severe shocks and jars may e made of relativtly thin material as they are only required to support the body of inaulating' oil, with the result that the rate of heat dissipation the transformer is much improved over that of transformers having walls of sufficient thickness to serve both as a container and as a bracing structure.

I claim as my invention:

1. In a tank structure. a base member. a frame-work secured thereto, a fluid-immersed device fitting within the framc-wtn'k without attachment thereto, and. a relatively thin tank wall mounted on the base member surrounding the 'lrame-work without attachment thereto.

:2. In a tank structure. a base member. a fr ne work sccurwl thereto, a fluid immei ed device fitting within the frame-work without ElttHCllD'lQl'lll thereto. a relatively thin tank wall mounted on the base member sur'- neeasse rounding the frame-work without attaclr ment thereto, and a header for the tank wall attached to the frame-work whereby the tank wall is protected by the framework from strains incidental to lifting the tank structure and to damage caused by shifting movements of the device within the tank.

3. In, a transformer structure, a base member, a frame-work secured thereto, core and winding members fitting within the frame-work without attachment thereto, and a relatively thin tank wall mounted on the base member surrounding the frame-work without attachment thereto.

l. In a transformer structure, a base member, a frame-work secured thereto, core and winding members fitting within the framework without attachment thereto, a relativclv thin tank wall mounted on the base member surrounding the frame-work without attachment thereto, and a header for the tank wall attached to the framework whereby the tank wall is protected by the framework from strains incidentto lifting the tank structure and to damage caused by shifting movements of the device within the tank.

The combination with a liquid-containing casing, of a frame extending longitudinally within said casing. an electrical de vice within said frame and normally spaced therefrom, and a member connected to said device and projecting toward said frame.

6. The combination with a base member,

of a liquid-containing vessel projecting upwardly therefrom. a frame comprising spaced members carried by said base member and extending upwardly within said casing, a header member to which said spaced members are secured, and an electri- 'al device within said frame.

7. The combination with a base member, of a liquid-containing vessel projecting" upwardly therefrom, a frame comprising spaced members carried by said base member and extending upwardly within said asing, a header member to which said spaced members are secured, l'tlIlfOl'Cll1I members scoured to said smccd members, and an electrical device witliin said frame.

In lCFtlIIlOltV whereof. I have hereunto subscribed my name this 12th day of March, 1926.

\VILLIAM J. FIN NEN 

